reverse dns configuration for IPV4, IPV6+ dns+ mail ?

[Mark Elkins]

Put two reverse records in both  the IPv4 and IPv6 reverse zones....

in the "125.124.123.in-addr.arpa" zone:

126   IN   PTR   mail.xxx.com.
126   IN   PTR   ns.xxx.com.

and the same sort of thing in the reverse IPv6 zone. To calculate run:-
2a01:e34:xxxx:xxxx:xxxx:xxxx:1122:3344
and see what question dig asks.

Nothing wrong with a machine (or interface on a machine) having more
than one name for the same address. List them all in the reverse
configuration. After all, a NS record usually has at least two records ;-)


On 18/06/2017 15:40, Pierre Couderc wrote:
> Well, we have 2 computers in xxx.com subnet provided by ISP on
> 123.124.125.126 ipV4  address and corresponding IPV6 segment
>
> mail.xxx.com :    2a01:e34:xxxx:xxxx:xxxx:xxxx:1122:3344 for mail server
> ns.xxx.com :  2a01:e34:xxxx:xxxx:xxxx:xxxx:aabb:ccdd for dns server
>
> In xxx.com bind :
>
> mail A 123.124.125.126
> mail AAAA 2a01:e34:xxxx:xxxx:xxxx:xxxx:1122:3344
>
> ns A 123.124.125.126
> ns AAAA 2a01:e34:xxxx:xxxx:xxxx:xxxx:aabb:ccdd
>
> What should I put for IPV4 reverse address : if I put mail.xxx.com,
> the reverse address will not point on ns.xxx.com, and if put
> ns.xxx.com, the reverse dns will not point on mail.xxx.com, and I
> shall have mail problem.
>
> What are the best practices fore thus problem ?
>
> Thanks
> PC
>
>
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-- 
Mark James ELKINS  -  Posix Systems - (South) Africa
mje at posix.co.za       Tel: +27.128070590  Cell: +27.826010496
For fast, reliable, low cost Internet in ZA: https://ftth.posix.co.za